There should be fluid in the converter. Plus still in lines and cooler. Put fluid in and warm engine to temp. Trans in neutral check and service. Go through the gears back to neutral check again until full. Good luck!
one thing I ran into once, when I tried filling an empty trans too fast is that you can actually get an airlock and it won't accept anymore fluid. So, don't rush it and dump the fluid in too fast.
So when I put the tranny pan back on should I fill the pan first or start it then fill it slowly.
my converter is aftermarket 2500 stall and new, but could be the problem or my gear vendor and have no idea how to check it out till monday and call them.